10. "The Haines Shoe House," Hellam, Pa. Mahlon Haines, who at one point owned 40 shoe stores in Pennsylvania and Maryland, built this three-bedroom, two-bath house —modeled after a high-topped work shoe — in 1948. "The Shoe Wizard," as Haines was called, initially used it as a guesthouse, Touring the house, where windows have stained-glass shoes and even the doghouse looks like a boot, is "major fun," says RoadsideAmerica.com.

9. "Field of Giant Corn Ears," Dublin, Ohio. Nicknamed "Cornhenge," the 109 concrete corn ears, some 6 to 8 feet tall, are actually part of a publicly funded work by Ohio State University sculpture teacher Malcolm Cochran, titled "Field of Corn (with Osage Orange)." The two-acre installation includes 13 diagonal rows of corn and two rows of Osage orange trees, one dating back to the 19th century, according to an article published on GreenMuseum.org.

8. "Largest Rocking Chair," Fanning, Mo.
If a giant were to tire of getting his kicks on Route 66, perhaps he could relax in this 42-foot-tall rocking chair, built in 2008 next to the Fanning 66 Outpost. Everyone else must wait until the seventh annual Picture on the Rocker Day on Aug. 2.

Photo: Abe Ezekowitz, Wikimedia

8. "Largest Rocking Chair," Fanning, Mo. If a giant were to tire of...

7. "Vacuum Cleaner Museum," St. James, Mo. Also found along historic Route 66, this museum and factory outlet is one floor below the Tacony Manufacturing Plant, where Simplicity and Riccar vacuum cleaners are still made. The archive of more than 600 vacuum cleaners includes the 1968 Hoover Constellation (pictured), which was inspired by the space race, according to the museum's Web site: "This vacuum not only resembled a UFO, but forced the exhaust air downward out of the canister causing the vacuum to lift off the floor slightly and float, seemingly defying gravity!

6. "World's Largest Twine Ball," Darwin, Minn. You'll have to peer through the glass to see this ball of sisal twine that's 12 feet in diameter and weighs nearly 9 tons. The result of 29 years of baler twine-winding by Francis Johnson, who finished it in 1979, it has inspired the nearby Twin Ball Museum and an annual celebration the second Saturday in August.

5. "Voodoo Merman," New Orleans. It's not entirely clear to what HotelCoupon.com users were referring with this choice, but most likely it's found inside Marie Laveau's House of Voodoo, which is renowned for having a "Fiji mermaid" (a monkey-fish sideshow hoax) in a bottle by its cash register, according to www.roadsideamerica.com. (Apparently, the store also does not permit photographs of its interior.)

4. "World's Largest Pez Dispenser," Burlingame, Calif. According to Gary Doss, curator of the Burlingame Museum of Pez Memorabilia, the 7-foot, 10-inch Pez-style snowman he created in 2007 holds the Guinness World Record for world's largest candy dispenser. (Note that the Pez Visitor Center, which opened in 2011 at the candy factory in Orange, Conn., also lays claim to "the world's largest working Pez dispenser.")

3. "Beer Can House," Houston. It took 18 years for retired Southern Pacific Railroad upholsterer John Milkovisch to cover his house with an estimated 50,000-plus flattened beer cans, before his death in 1988. He previously had covered the yard with concrete embedded with thousands of marbles, rocks and other items allegedly because he was "sick of mowing." It's open to visitors, managed by the Orange Show Center for Visionary Art.

Photo: Andrew Wiseman, Wikimedia

3. "Beer Can House," Houston. It took 18 years for retired Southern...

3. "Beer Can House," Houston. It took 18 years for... Photo-6483325.88263 - SFGate

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2. "Aircraft Boneyard," Tucson, Ariz. A dismantled B-47 Stratojet is among the more than 2,500 aircraft stored at the Aerospace Maintenance and Regeneration Center (AMARG), better known as the Aircraft Bone Yard, at Davis-Monthan Air Force Base. The adjacent Pima Air & Space Museum offers exclusive bus tours of the collection of the field of aircraft, most of which are used for parts or eventually put back in service.

1. "Toilet Paper Hero of Hoover Dam," Boulder City, Nev. Steven Liguori's bronze sculpture of Alabam, a Hoover Dam sanitation worker, stands next to a marker that reads: "At the height of Hoover Dam construction, more than 7,000 men labored in Black Canyon. Some jobs were glamorous and exciting, such as the high scalers who swung over the canyon on ropes or the cableway operators who kept concrete buckets moving 24 hours a day, 7 days a week. Other jobs were more mundane, but no less important: there were mockers who shoveled mud out of the tunnels, truck drivers who hauled rock up and down the river or, like the man you see here, those who swept the outhouses and kept them well supplied with paper."